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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.apache.myfaces.orchestra.lib.jsf;
20  
21  import javax.faces.FacesException;
22  import javax.faces.context.FacesContext;
23  
24  import org.apache.myfaces.orchestra.conversation.ConversationManager;
25  
26  /**
27   * RequestHandler that simply ensures that a ConversationManager exists for the current user
28   * at the start of a request.
29   * <p>
30   * However if there is no session then one is not created, as that would force the creation
31   * of a session to store it in. Creating the session is particularly unfriendly for apps
32   * that use weblets and disable cookies..
33   * 
34   * @since 1.1
35   */
36  class ConversationManagerRequestHandler implements RequestHandler
37  {
38      public void init(FacesContext facesContext) throws FacesException
39      {
40          Object session = facesContext.getExternalContext().getSession(false);
41          if (session != null)
42          {
43              ConversationManager.getInstance();
44          }
45      }
46  
47      public void deinit() throws FacesException
48      {
49      }
50  }
51